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      12-10-2012, 09:58 AM   #1
baege
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Question about Disa valve:

Is it a noise that goes away after the engine is warm?

I notice that when my n52 is cold after start up, there is a slight rattle above 1500 rpm. It goes away once the engine is warm.

I know about the "ticking" issue, and the rattle I am talking about is different. There is no rattle noise evident at idle upon cold start, its only when I am driving and the rpms rise above about 1500 rpm that this rattle appears. I have heard this for a while and never thought anything of it (just normal cold operation sound) until I came across the whole DISA valve discussion.
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      12-10-2012, 12:37 PM   #2
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The obvious...Is the noise coming from the DISA valve? When it happened to my M54 X5, you can clearly hear it coming from the DISA valve even at idle.
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